The baby boy was found dead on the banks of the River Lagan close to the Legacurry Road.He had been placed in a green plastic bag and a post mortem examination found that he was born alive but had died as a result of head injuries.Friday marks the 30th anniversary of the death and police have renewed their appeal for witnesses.Detectives from Serious Crime Branch have appealed for the boy's parents to come forward in order to obtain a match for a DNA profile they have secured.Detectives have made a number of inquiries to try to identify and locate the boy's parents.The most recent of these have included work to obtain a DNA profile which would assist with identification.Detective Chief Inspector David Cunningham, from Serious Crime Branch, said: "I am sure someone knows what happened in this case. "It is first and foremost a tragedy. The boy would be a 30-year-old man, perhaps with a family of his own."As it is, he is a baby with no name, no family and no history."We owe it to this child to do everything we possibly can to determine the circumstances surrounding his death."If you are one of the parents of this baby boy and you have been wrestling with your conscience for the past 30 years, then this is an opportunity for you to do something positive about it."I would also ask anyone with information, even after 30 years, to be true to themselves and to the memory of this baby boy and talk to us."He added: "We have obtained a DNA profile and efforts are being made to match this with samples on the DNA database."Our investigative work will continue and with advances in forensic science we are hopeful of making further progress."If you know or suspect who the parents are, then let us know and we can carry out a forensic comparison."But the best way of reaching an informed resolution to our investigation would be for the boy's parents or anyone who has information, suspicions or concerns about the circumstances of his birth and his untimely death 30 years ago to come forward and talk to police."Police can be contacted on 028 9070 0727 or 075 8522 8283.CHAR(13) + CHAR(10)